Reasons for the high CO2 content in the gasifier at low temperatures
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Under normal operation, the temperature of the gasifier is low when the methane content is high. A high carbon dioxide content results in a higher temperature in the gasification furnace. Are there any other abnormalities? For example, high levels of both CO2 and methane? Or what is the reason for the high carbon dioxide content at low temperatures?
The methane content is based on the same type of raw coal; if the raw coal changes, is it possible for the methane content to be high if the coal formation age is younger?
Has the quality of the coal changed? Or do the manual and online analysis data of syngas correspond?
Is an increase in both methane and carbon dioxide indicative of higher ash content, leading to the formation of high-temperature areas in some areas?
Theoretically, indeed, the furnace temperature is proportional to methane. But in reality, there is indeed a phenomenon where CH4 levels increase when the furnace temperature is high. The specific mechanism is unclear. One can only argue with the boss.
High furnace temperature means high methane levels – have you seen that?
1. Instrument issues； 2. Issues related to coal quality changes ； 3. This phenomenon can also occur when the slag outlet is blocked ； 4. This situation is more common in furnaces with water-cooled walls
When both methane and carbon dioxide are high. First, check the components of the active gases. Furthermore, the coal quality changes. Finally, doubt the instrument.
For four-nozzle gasifiers, the variation in syngas composition is greatly influenced by the slag outlet, specifically by the residence time